opscode/chef — pull request #266 by oscardelben (2012-04-10 10:50:36+00:00)
Title: Give a more informative error message for malformed keys

It often happens that pasting private keys results in control codes being pasted in the private key.

In those scenarios, the error message is not very informative as the start and end line may be perfectly legit. I would prefer a more informative error message instead.